Hoist.



M. B. MOYER.

H-OIST.

APPLICATIONJILED MN. 18. I911.

Patented Mar. 12, 1918.

2 SHEETS-SHEET 2 MALCOLM B. IVIOYER, 0F MONTEVIIDEO, MINNESOTA.

Holst i Specification of Letters Patent.

Patented Mar;12, 1918..

Application filed January 18, 1917. Serial No. 143,140.

To all whom it may concern:

Be it known that I, MALCOLM B. Mount, a citizen of the United States,residing at Montevideo, in the county of Chippewa and State ofMinnesota, have invented certain new and useful Improvements in Hoists;and I do declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

My invention has for its object to provide a simply constructed yetefficient and durable. hoist having improved means wherebythe load isheld against retrograde movement while being raised and whereby it maybe gradually or suddenly lowered as occasion may demand.

\Vith the foregoing general object in view, the invention resides incertain novel features of construction and in unique combinationsof-parts to be hereinafter fully described and claimed, the descriptivematter being supplemented by the accompanying drawings which constitutea part of this application and in which Figure 1 is a perspective viewof the improved hoist in use;

Fig. 2 is an enlarged vertical longitudinal section thereof showing therelation of parts when lowering a load Fig. 3 is a similar view showingthe relative positions of parts when the load is being raised;

Fig. 4 is a vertical transverse section on the plane of the line 44 ofFig. 2;

Fig. 5 is a perspective view of the hub of the operating wheel; and

Fig. 6 is a similar View of the collar which cooperates with said hub.

In the drawings above briefly described, the numeral 1 designates anarched casting having bearings at its lower ends in which approximatelyhalf the length of a horizontal shaft 2 is rotatably mounted, the otherhalf of said shaft being flattened on opposed sides as shown at 3.Rigidly secured on or formed integrally with the first named half of theshaft 2 is a drum 4 on which a cable, chain or the like 5 is wound, thefree end of said cable being provided with a grapple 6 preferably in theform of a hook as shown.

One or more ratchet disks 7 are mounted loosely on the flattened portionof the shaft and permit. said shaft to rotate independently of saiddisks when required, the edges of said disks having ratchet teeth 8cooperating with the dog 9 pivoted to an arm 10 which extends laterally.from the upper end of the support 1. A clamp is provided for locking thedisks 7 to the shaft, said clamp consisting of a fixed collar 11 and amovable collar 12, both mounted on the flattened portion of said shaft.The collar 11 is disposed at the juncture of the reduced half of theshaft with the other half there- 'of and isnot only'fixed againstsliding, but

collar 12, said collar and wheel having hubs 15 and 16 respectivelywhich are thrown into contact with each other when the wheel 14 iscaused to shiftlengthwise on theshaft by means to be explained.

The outer end of the hub 16 is in the form of a helix cooperatingwith acollar 17 which is mounted non-rotatably on the reduced end of the shaft2; The inner face 'of said collar may be shaped similarly to the outerend of the hub 16 if required, but

in most cases said end of the hub will. co- 1 operate with a lug 18 caston or rigidly secured to the collar 17. A pair of nuts 19 are threadedon the outer end of the shaft 2 for adjusting the collar 17 along thesame and holding said collar in adjusted position.

In operation, the grapple 6 is connected with the load and by means ofan endless cable or the like 20, the wheel 14 is turned in onedirection. This causes the helical end of the hub 16 to engage the lug18 so that said hub is shifted upon the shaft into contact with the hub15 of the collar 12, then serving to force this collar toward 11 toclamp the disks 7 to the shaft. Further rotation of wheel 14 will turnthe entire shaft 2 to wind the cable 5 on the drum 4. During thisoperation, the dog 9 cooperates with the teeth 8 to prevent retrogrademovement of the drum and when lowering of the load is required, saiddisks cooperate with the collars 11 and 12 and the disk 13 in allowingit to lower slowly or abruptly '14- is turned in a counter-clockwisedirection,

t-he'disk 1.3 will. be free to rotate and thus permits rotation of thedrum and shaft, to lower the load. Stopping of said Wheel, however,binds the disk 13 between disks 8 and the load is broughtto astandstill.

From the foregoing, taken in connection with the accompanying drawings,it will be observed that although the invention is of extremely simplenature, it will be highly eflicient and durable. For these reasons, theconstruction shown and described constitutes the preferred form of thehoist, but it is to be understood that within the scope of the inventionas claimed, numerous changes may be made without sacrificing theprincipal objects.

1 claim A hoist comprising a frame having horizontally alined bearings,a horizontal shafthaving a portion of its length received rotatably insaid bearings and provided with means for winding a chain or cable bythe rotation of the shaft, the other end of said shaft being flattenedon opposite sides and threaded at its free end, a fixed collar havingan. opening snugly receiving said flattened portion of the shaft, saidcollar abutting the shoulder at the juncture of the fiattened and roundportions of the shaft, a

non-rotatable on the flattened portion ofthe shaft, a dog carried by theframe and cooperating with said ratchet teeth, a control wheel havingits hub mounted rotatably and slidably on the flattened portion of theshaft adjacent the outer face of the movable collar, the hub of saidcontrol wheelhaving its outer end of helical formation, a thrust collarmounted non-rotatably on the shaft and having means cooperating with thehelical end of the hub, and one or more nuts threaded on the free end ofthe flattened portion of said shaft for holding said thrust collar inoperative position.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

MALCOLM B. MOYER.

lVitnesses M. SILCOTT, V. H. STUABD.

Goples of this patent may be obtained for five cents each,byaddressihgthe Commissioner of Patents,

Washington, D. 63;

Lbn

